+++ /dev/null
-/*
-** Copyright 2000 Double Precision, Inc.
-** See COPYING for distribution information.
-*/
-
-/*
-** $Id: imapsubj.c,v 1.10 2006/04/11 02:24:59 mrsam Exp $
-*/
-#include <stdio.h>
-#include <ctype.h>
-#include <stdlib.h>
-#include <string.h>
-#include "rfc822.h"
-#include "config.h"
-
-#if HAVE_STRCASECMP
-
-#else
-#define strcasecmp stricmp
-#endif
-
-#if HAVE_STRNCASECMP
-
-#else
-#define strncasecmp strnicmp
-#endif
-
-/* Skip over blobs */
-
-static char *skipblob(char *p, char **save_blob_ptr)
-{
- char *q;
- char *orig_p=p;
- int isalldigits=1;
-
- if (*p == '[')
- {
- for (q= p+1; *q; q++)
- if (*q == '[' || *q == ']')
- break;
- else if (strchr("0123456789", *q) == NULL)
- isalldigits=0;
-
- if (*q == ']')
- {
- p=q+1;
-
- while (isspace((int)(unsigned char)*p))
- {
- ++p;
- }
-
- if (save_blob_ptr && *save_blob_ptr && !isalldigits)
- {
- while (orig_p != p)
- *(*save_blob_ptr)++=*orig_p++;
- }
-
- return (p);
- }
- }
- return (p);
-}
-
-static char *skipblobs(char *p, char **save_blob_ptr)
-{
- char *q=p;
-
- do
- {
- p=q;
- q=skipblob(p, save_blob_ptr);
- } while (q != p);
- return (q);
-}
-
-/* Remove artifacts from the subject header */
-
-static void stripsubj(char *s, int *hasrefwd, char *save_blob_buf)
-{
- char *p;
- char *q;
- int doit;
-
- for (p=q=s; *p; p++)
- {
- if (!isspace((int)(unsigned char)*p))
- {
- *q++=*p;
- continue;
- }
- while (p[1] && isspace((int)(unsigned char)p[1]))
- {
- ++p;
- }
- *q++=' ';
- }
- *q=0;
-
- do
- {
- doit=0;
- /*
- **
- ** (2) Remove all trailing text of the subject that matches
- ** the subj-trailer ABNF, repeat until no more matches are
- ** possible.
- **
- ** subj-trailer = "(fwd)" / WSP
- */
-
- for (p=s; *p; p++)
- ;
- while (p > s)
- {
- if ( isspace((int)(unsigned char)p[-1]))
- {
- --p;
- continue;
- }
- if (p-s >= 5 && strncasecmp(p-5, "(FWD)", 5) == 0)
- {
- p -= 5;
- *hasrefwd |= CORESUBJ_FWD;
- continue;
- }
- break;
- }
- *p=0;
-
- for (p=s; *p; )
- {
- for (;;)
- {
- char *orig_blob_ptr;
- int flag=CORESUBJ_FWD;
-
- /*
- **
- ** (3) Remove all prefix text of the subject
- ** that matches the subj-leader ABNF.
- **
- ** subj-leader = (*subj-blob subj-refwd) / WSP
- **
- ** subj-blob = "[" *BLOBCHAR "]" *WSP
- **
- ** subj-refwd = ("re" / ("fw" ["d"])) *WSP [subj-blob] ":"
- **
- ** BLOBCHAR = %x01-5a / %x5c / %x5e-7f
- ** ; any CHAR except '[' and ']'
- */
-
- if (isspace((int)(unsigned char)*p))
- {
- ++p;
- continue;
- }
-
- q=skipblobs(p, NULL);
-
- if (strncasecmp(q, "RE", 2) == 0)
- {
- flag=CORESUBJ_RE;
- q += 2;
- }
- else if (strncasecmp(q, "FWD", 3) == 0)
- {
- q += 3;
- }
- else if (strncasecmp(q, "FW", 2) == 0)
- {
- q += 2;
- }
- else q=0;
-
- if (q)
- {
- orig_blob_ptr=save_blob_buf;
-
- q=skipblob(q, &save_blob_buf);
- if (*q == ':')
- {
- p=q+1;
- *hasrefwd |= flag;
- continue;
- }
-
- save_blob_buf=orig_blob_ptr;
- }
-
-
- /*
- ** (4) If there is prefix text of the subject
- ** that matches the subj-blob ABNF, and
- ** removing that prefix leaves a non-empty
- ** subj-base, then remove the prefix text.
- **
- ** subj-base = NONWSP *([*WSP] NONWSP)
- ** ; can be a subj-blob
- */
-
- orig_blob_ptr=save_blob_buf;
-
- q=skipblob(p, &save_blob_buf);
-
- if (q != p && *q)
- {
- p=q;
- continue;
- }
- save_blob_buf=orig_blob_ptr;
- break;
- }
-
- /*
- **
- ** (6) If the resulting text begins with the
- ** subj-fwd-hdr ABNF and ends with the subj-fwd-trl
- ** ABNF, remove the subj-fwd-hdr and subj-fwd-trl and
- ** repeat from step (2).
- **
- ** subj-fwd-hdr = "[fwd:"
- **
- ** subj-fwd-trl = "]"
- */
-
- if (strncasecmp(p, "[FWD:", 5) == 0)
- {
- q=strrchr(p, ']');
- if (q && q[1] == 0)
- {
- *q=0;
- p += 5;
- *hasrefwd |= CORESUBJ_FWD;
-
- for (q=s; (*q++=*p++) != 0; )
- ;
- doit=1;
- }
- }
- break;
- }
- } while (doit);
-
- q=s;
- while ( (*q++ = *p++) != 0)
- ;
- if (save_blob_buf)
- *save_blob_buf=0;
-}
-
-char *rfc822_coresubj(const char *s, int *hasrefwd)
-{
- char *q=strdup(s), *r;
- int dummy;
-
- if (!hasrefwd)
- hasrefwd= &dummy;
-
- *hasrefwd=0;
- if (!q) return (0);
-
- for (r=q; *r; r++)
- if ((*r & 0x80) == 0) /* Just US-ASCII casing, thanks */
- *r=toupper((int)(unsigned char)*r);
- stripsubj(q, hasrefwd, 0);
- return (q);
-}
-
-char *rfc822_coresubj_nouc(const char *s, int *hasrefwd)
-{
- char *q=strdup(s);
- int dummy;
-
- if (!hasrefwd)
- hasrefwd= &dummy;
-
- *hasrefwd=0;
- if (!q) return (0);
-
- stripsubj(q, hasrefwd, 0);
- return (q);
-}
-
-char *rfc822_coresubj_keepblobs(const char *s)
-{
- char *q=strdup(s), *r;
- int dummy;
-
- if (!q) return (0);
-
- r=strdup(s);
- if (!r)
- {
- free(q);
- return (0);
- }
-
- stripsubj(q, &dummy, r);
- strcat(r, q);
- free(q);
- return (r);
-}
HCoop / hcoop / debian / courier-authlib.git / blobdiff
